Square



Patented @ed 1l, 1923.

mrs

Mai

ISAIE DION', 0F SWANSEA, MASSACHUSETTS.

SQUARE.

Appucauon mea March 1s, i922. serial No. 544,854.

To all 'whom t may concern:

Be itknown that IsAIE DION, a citizen of the United States, residing at Swansea, in the county of Bristol and State of Massachusetts, has invented certain new and useful Improvements in Squares, of which the following is a specification.

This invention relates to squares and consists in novel features hereinafter shown, described and claimed.

In the drawings forming a part of this specification, like characters of reference designate corresponding parts in the seven figures, in which-` Figure 1 is a plan view of a square embodying the features of the invention with the parts in their normal closed position,

Figure 2 is an enlarged top plan view of the hinge of the square with the blade and tongue in full open position,

Figure 8 is asimilar plan view of the back thereof,

Figure 4 is a similar top planview with the blade and tongue in a partially open position.

Figure 5 is an enlarged cross sectional view through the blade and tongue taken on line 5-5 of Figure 1,

Figure 6 is a detail sectional view taken on line 6-6 of Figure 4, and

Figure 7 is a detail sectional view taken on line 7-7 of Figure 2.

Referring to the drawings, the square comprises a blade 10 and tongue 11 which are pivotally connected by means of a member 12.

The blade and tongue members are longitudinally recessed, as best shown in Figure 5, so that they will fold together' into as compact a form as possible. The tongue 11 is provided with a projecting portion13 at one end on its upper surface over the recessed portion. This portion 13 is formed round concentric with the axis of the pivot and flares conically inward toward the top.

Blade 10 is further recessed at 14 soy as to receive the bevelled projection 13, and its lower portion is 'cut away at 15, and the blade and tongue are so shaped at their ends that they will complementally receive each other so that they can be pivoted together and open and close on each other.

The pivot 12 comprises a bevelled meinber 16 extending into a. bevelled aperture in the upper surface of the tongue and a bevelled, or so'called flat-headed screw l17 extends up through a bevelled aperturey in the bottom of the blade 10 for holding the member 16 inI place. The screwis threaded into the member 16 eccentrically so that the y two members securely engage each other vand the blade member. The pivot memberA 16 and the screw particularly are thus prevented from turning in relation to the blade member so that the blade maybe considered as carrying the pivot. f The blade and tongue may be locked in open position by means of one or more screws such as 18 and 19 which are carried in -apertures in the top and bottom faces of blade and tongue respectively. Screw 18 set in thetupper face of the blade is adapted to have its outer edge engagea recess 217 y in the projection 13 f. of the tongue. |The screw has its edge cut away at 21 and is notched at 21', and when it is turned so that the cutportion is presented toward the projection and the notch so as to receive the lower edge thereof, the tongue can be turned on the pivot. Screw 19 is similarly cut away at 22 and positioned in the tongue so as to cooperate with a recess 23 in the blade.

When the blade and tongue are closed,

lanother screw 24, similar to screws 18 and 19, can be used to lock the members together. This Screw is cut away at 25 and the tongue recessed at 26 to receive the edge of the screw. 1 The screw can be lturned down tight upon the tongue and bladefor locking them, or rotated in a reverse direction untily the cut away portion 25 faces the recess" 26 thus releasing the members. In orderto lock the blade and tongue at various .angles with each other so that the instrument may be used as a bevel, the blade may be provided with a screw 27 positioned therein substantially radially of the axis f of the pivot 12, in order that its point may engage in notches 28 in projection 13. The screw is preferably provided with a knurled nut 29 positioned in an aperture in thel blade, and upon turning it with the fingers, the screw is projected toward or retracted from the projection 13. j 1n case it is found necessary to adjust or true the square, the tongue s provided with a screw 30 which can be extended from the end of the tongue as an abutment for engaging the blade.

The square can loe-calibrated in the usual manner and one of the faces, the top face as disclosed in Figure-l, can be calibrated in degrees around the pivot so that the instrument can be used as a p'rotractor. The back face can also be calibrated for other pur-l poses, such as a scale giving rater cuts, and notches 28 can be so spacedas to correspond with various calibration marks, or they may be so small and close together that a very fine adjustment can be secured.

' The square has been shown with two form of locking members, screws 18 and 19 for fastening itin open position and a screw 27'for securing the members at angleslof less than degrees. able arrangenient,usmg the two forms in this manner-since as a square, the screws 18 and i9 will hold it most rigidly and screw` 2? can be used advantageously for various adjustments, it is also possible to hold the members in an T of their ositions open or closed, by anyone of these screws. The square is constructed so that its` blade and tongue members 'have their faces inthe same planes, and due to the complemental recesses in them they may partially close upon each other. ln order to Jfurther out down the weight these members may be tapered from a thick portion at Itheir `pivot to thinner endsremote from the pivot.

Having disclosed one form of the invention for purposes of illustratiomjit is to be understood that various changes may be made in form arrangements-nd organization oparts as may fairly fall within the scope of the-invention as claimed.

Wha-t kis claimed as the invention and is desired to be secured by Letters Patent is l. A square comprising blade and tongue members pivoted to each "other at their meeting ends and each being complementally recessed whereby they maybe folded together, and a screw carried bythe blade adapted to engage the end of the tongue remote from the pivot when the :members are closed upon each other for securing them together.

2. A square comprising blade and tongue members pivoted to each other at their meeting ends and each being complementally recessed whereby they' may be 'folded together, said tongue having 'a recess in its outer end, a screw carried'by the blade atv a. point beyond the end of the tongue remote from` the 'pivot when the members are closed upon each other, said screw v'being `While this is the prefertending through the second member and threaded into an aperture in said pivot member eccentric to the axis of the pivot.

4. Two overlapping pivotally connected members, there being an aperture in one of said vmembers concentric withthe axis of the pivot and an aperture through the second :member eccentric to the asis of' the pivot, a pivot member passing through the concentric aperture in the first member and engaging vthe vsecond member, and a screw member passing through the eccentric aperture and into the pivot member thereby securing the pivot and 4members in position.

5. A square comprising a blade and tongue members7 one of said'members being provided vwith a bevelled round projection at its end with its center between thev side` edges of the member adapted to fit into ya correspondingly shaped recess in the other member ofthe square, and a pivot member concentric with the rounded projection for securing the members together.

6. In a square in accordance with claim 5, said iirst named member having ajseries of notches in its bevelled rounded proj ection.y a screw carried by the second, or recessed member and arranged'radially of the pivot axis, and means for projecting said screw` into engagement with andre racting it from the notches in said projection of the first member.

7. Asquare comprising blade and tongue members complementally Vrecessed whereby they fmaybe foldedytogether, a pivot between the-side edges of the tongue and blade ymem-l bers adjacent to their ends, -for securing said members together, one of said members having a rounded beveled under-cut recess concentric with the axis or` `the pivot,

the adj acent pivoted end .of the other member having a 'rounded portion concentric with the ot the pivot and havingl a beveled projection thereon adapted toA complementally engage within the under-cut portion ofthe irst'said member. j y ln testimony whereof he aliises his signature.

SAIE DlON. 

